Portable display device



FIG. 1 is a front perspective view of a portable display device showing our new design in a first embodiment;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is a front perspective view of a portable display device showing our new design in a second embodiment;

FIG. 9 is a front view thereof;

FIG. 10 is a back view thereof;

FIG. 11 is a left side view thereof;

FIG. 12 is a right side view thereof;

FIG. 13 is a top view thereof; and,

FIG. 14 is a bottom view thereof.

The broken lines in FIGS. 7 and 14 and the lower opacity areas within the broken lines show portions of the portable display device that form no part of the claimed design. 

CLAIM The ornamental design for a portable display device, as shown and described. 